Oscillaria

As a representative of the group, we will select one of the commonest forms (_Oscillaria_), known sometimes as green slime, from forming a dark blue-green or blackish slimy coat over the mud at the bottom of stagnant or sluggish water, in watering troughs, on damp rocks, or even on moist earth.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

Most of the diatoms show movements, swimming slowly or gliding over solid substances; but like the movements of _Oscillaria_ and the desmids, the movements are not satisfactorily understood, although several explanations have been offered.

Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell

Their general form is very similar to a group of low green plants known as Oscillaria.

The Story of Germ Life